US PATENT SUBCLASS 356 / 312
.~.~ By electrical resistance heating (e.g., graphite tube)

Current as of: June, 1999
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356 /   HD   OPTICS: MEASURING AND TESTING

300  DF  BY DISPERSED LIGHT SPECTROSCOPY {10}
311  DF  .~ With sample excitation (e.g., burning) {5}
312.~.~ By electrical resistance heating (e.g., graphite tube)

DEFINITION

Classification: 356/312

By electrical resistance heating (e.g., graphite tube):

(under subclass 311) Subject matter wherein the sample is heated to an excited state by passing an electrical current through the sample cell or support.

SEE OR SEARCH CLASS

219, Electric Heating, 600+ for inductive heating,

678+, for microwave heating, and subclasses 764+ for capacitive dielectric heating; subclasses 65 and 162 for apparatus and methods for the electron beam heating and disintegration of metals; subclasses 50+ for the methods and apparatus for resistive heating of metals; subclasses 260+ for resistive igniters of solid material; and subclasses 271+ for electrical resistive heater-type vaporizers.